Roller-mill for crushing materials such as stone or ores



ROLLER MILL FOR CRUSHING MATERIALS SUCH AS STONE 0 M. CONDER AND G. T. VIVIAN.

R ORES.

Patented July 5, 1921.

2 SHEETS-SHEET I.

APPLICATION FILED 1AN.26,-I92l.

c. MrcONDEB AND G. T. vlvlAN. ROLLER lvm-Ll For; cnusHlNG MATEmALs suH As sroNE 0R oREs. APPLICATION FILED JA- 26, 1921. 1,383,529, Patented July 5,1921.

2 SHEETS-SHEET 2- AUN-i'rlan STATES CHARLES 4iinsmxnzrirlr. coNnEE AND PATENT ori-ice GODEEEY TWYNAM vrvrAN, E cAivriaoaNE, ENGLAND. V-

" Specicaton of Ifettersatent. "Patented July 1921.

' Appiie'auon med January 26,1921.-Y seriai No. 440,226.

To all who-meat may concern.'

@ONDER and GODEREY TWY'NAM VIvIAN,both subjects of the Kingof Great Britain, and both residing at Camborne, in the county of Cornwall, England, have invented certain new` and useful Improvements in and Relating to Roller-Mills for Crushing Materials Such Aas Stone or Ores, for which we have filed an application in England, January 24, 1920, of which `the :following is a specification.

This invention relates to ,roller mills for crushing materials suoliv as stone or ores wherein a'pair vof rolls rotated in opposite directions, are pressed toward eachother so as to exert a crushing or v`so1ueezingpressure on the material fed into the machine., There is a relation between the size of material fed tothe machine andthe crushed product, which is controlled by ythe angle of nip or the angle at which the rock or the like, is gripped by and drawn down between the rolls. The object of the present inven-V tion is to increase this angle, and this is done by mounting theroller shafts `in bearings resting on slide blocks at an angle to the horizontal, hereinafter more fully set forth. v'Certain other improvements are introduced, rendering the machine of simpler construction, and more convenient in use, and will be described hereinafter with reference to the accompanyingdrawi'ngs wherein Figure 1. shows a side elevation of the machine, partly in section.

Fig. 2. shows an end elevation partly 1n section.

Fig. 3. shows a plan of the machine and Fig. 4. shows a detail view.

Referring to the drawings, 1 indicates the base or frame of the machine while 2 indicates the wearing plates arranged at an angle to the horizontal, and adapted to support the swivel slide plates 3. The plates 3 are provided with a hole as shownV at 30, to enable the roller shaft journals 4 to swivel slightly in the event of a lump of ore or rock forcing one side of the rolls apart more than the other andthus allowing the roller shafts to swivel about their journal centers. By arranging the slide plates 3 supporting the roller journals 31 at an angle as described, the rolls'and their shafts tend to Be it known that we, CHARLES MARKHAM- slide, toward l one another, so that their weight, 4which' is considerably due to the nature of their work may be utilized and thus save a lcorresponding amount of the spring or weight pressure which is neces-v sary tov obtain the requisite crushing lpressure. If during the crushing operation a hard lump of material should come between the rolls, -this would tendto force .the axes of the rollers farther apart, so that the rollers would beforced up-hill on their slides 2. The angle'of nip or angle at which the rock is gripped, is also increased, as the axesv ofthe rolls are raised thus tending to bring theaxes ofthe rolls and the material, which is being crushed, 'to aV straight line. It is obvious that the nearer a straight line opposite crushing forces are employed to operate alone, the greater the eiiciency, and also the resulting pressure. On each side of the journals 31 of the roller shaft 19 there is provided a dust collar 5 for preventing any material from, entering the journals. According to the present construction the springs 29 employed act at right angles to the axes of the shafts 19, and by employing them to operate through a toggle device, the number of springs is reduced. Referring to the vdrawings, it will be seen that each roller journal 31 has lugs 34 cast thereon. These lugs 34 support pins 6 which carry short connecting rods 7 hinged at their other ends at 35 to a base plate 8. On the upper side of this plate 8 are mounted compression springs 29 adjusted by a number of tension bolts 9 held at their lower end 33 in the frame 1, while the nuts 11 at their upper end press against the pressure plate 10. By tightening or loosening these nuts 11 the pressure exerted by the springs 29 on the `connecting rods 7 thus tending to draw the roller shafts toward one another, may be increased or reduced. In order that the rolls 32 may be adjusted to remain at a minimum distance between their axes, while still allowing them to move apart during working wedge shaped members 12 are placed between the journals 31 and the frame 1. These wedge shaped members which are provided with a recess at 35 to accommodate the lugs 34:, pins 6 and arm 7, are adapted to be adjusted by nuts 13 working kon threads on shanks 36, andpressing aga-inst ylugs 37 cast on frame 1. During working the tendency would be for the the wedges 12 and working at right angles These wedges 14 have spigots 38 thereto. running through holes in the frame '1 and maybe adjusted by means of nuts 15 Vworking on threads formed on the spigots 38. Should it be Y found necessary in Voperation toin'crease vthe minimum distance between 4mountedfa feed hopper 24.

the roll axes, 'the nuts 13would be tightened, thus raising vthe wedges 12, thenthe nuts 15 would be tightened until the auxiliary wedges 414 were ytight against the -main wedges 12. l Y

The rolls 32 are'of usual construction vand eachk consists of arollshell ortire 16 sup-v portedby coned` shaped'hearts or centers 17 engaginginthe double coned inner Aface of the tire V16. The Yhearts 17 may be forced together byV means of bollts 18'thus holding the tire `16 securely-to the conedhearts`17,which inturn are mounted on shafts 19 to which they are keyed. To prevent theescape of dustor materiahfa cover or case is` provided in sections 20,26 of a convenient size, the. Acentral Vsection 20 supporting cheek lates 21V which prevent material spilling o the facefof the rolls. These cheek plates 21 are held up by means of'bolts 22, while'thedisvtance between the cheek plates and the rollsVVV may beregulated by threadeddistance pins 23 passing through tapped holes in the cover section 20. On the top of thecover 2O is One end of eachshaft 19 isextended and driving pulleys 28 mounted thereon, for driving the shafts in opposite directions.

If desired 'the pulleys may be drivenat dif ferent-speeds to vobtain a grinding action necessary for certain materials.

Y VIfllavingv thus described our invention what weV claim as new anddesire -to secure.

by Letters VPatent is :--V

l1'. A roller crushing milly comprising a frame with vertical and inclined bearing surfaces, journals mounted-on'saidinclined :bearing surfaces, shaftsV mounted in said journals, rolls keyed to Said shafts, driving necting together said journals, spring meansV acting onY said toggle levers andSadapted-to draw'the journalsftowardone another, and wedge members with meansY for .adjustingY same between the journals vandthe vertical bearing surfaces.

v2. A roller crushing mill comprising a' Y frame with vertical and `inclined bearing pulleys on saidshafts, Jtogglefl'evers consurfaces thereon, journalsmounted Vonthe journals,'=rolls keyed-toVv said shafts, dust VI' covers'for said journals, saidfdust Vcoversfbejins mounbdil the Shaft; driving-.pulleys Vo n said shafts, togglelevers connecting ',to`

vgeth'er journals', jspring'means acting on saidtoggle'levers and-adaptedto draw the vjournals toward r4.onef-r another, wedge V',niemf' bers with 'means foradjusting samebetween the `journals ,andthe vertical 'bearingsurf faces, and a-,casing ing the rolls. l

I cHnRLns MRKHMCONDER GODFREY VIVIAN, Y

withV a'hopperfor inclos- 

